Question

why is hydrogen placed in group 1

Answer 1

Answer:

Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. ... Because hydrogen is a nonmetal and forms H- (hydride anions), it is sometimes placed above the halogens in the periodic table. Hydrogen also forms H2 dihydrogen like halogens.

Explanation:

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Answer 2

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ANSWER :

Hydrogen is placed in group I of the modern periodic table due to following reasons:-

(1) It shows outer electronic configuration similar to group I elements (i.e.1s1).

(2) It readily looses its electron to form H+ ion which resembles the electropositive character of group I elements.

(3) It shows +1 oxidation state like alkali i.e. group Ielements.

(4) Hydrogen also acts as a strong reducing agent like alkali metals and also forms binary compounds with electronegative elements which resembles the group I elements.

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